Lifting device



Afforneys Jan. 13, 1959 A. L. VIEBKE LFTNG DEvcE: v

Fi1ed May 2. 1955 L1ETING DEv1CE A1gof Leonafd viehke, Sfockhon1,Svveden AppHoaooo Moy 2, 19s5, Sefia1 Nol ss,171

1 c1oim, (CL Zs4-93) The pfesent invention fefefs to soch a liftingdevioe as coInpfiSes tWo of ffofe oolufnns With SectionS af fanged fofte1eScopic moveInent in each othef. Eaf1feT SUch lifting deviceS havebeen pfovided with Iocking nlechanisIns and valveS of other expenSiveIneanS to n1ake the piSfons n1ovo in the coffect succession ande1iII1inate distufbing iston alterafions, speed diffefeoces and vafyingpfeSSufe of the mediun1 used for Hfting. The pfesent inventioneHn1inafes the need of soch expenSive devices. The chafactefisticfeatufes of fhe pfes, eot invention afe that evefy Section i11 onecolun1n is coobined vvith thaf of those sectionS in the other coloInn ofcolunnS Which iS the Same number of sectionS ffoIn a given end of thecoloInn, and that each gfoup of cofnbined seofionS has the salT1e tota1pfesSure area. The pistons vvf11 antoInaticany fo11ow each other Withthe san1e Speed, and aS a fesu11 it is of no iInpoftance Which of thepiSton unitS staftS oloving at the faising of lowering opefation.

Fofther features and advantageS of the invenffon vvin appeaf ffolI1 thefollovving deScription, Tefefence being had fo the acconpanyingdiagrafnInafic dfavving i1II1S tfating a pfefefred embodiment of alffting device compfising tvVo co1on1ns.

Fig. 1 ShoWs a Side vieW of said Hfting device;

Fig. Z is a Secffona1 vieW a1ong line Zz of Fig. 13 and Figl 3 is aSectiona1 vieW along line 3-3 of Fig. 2.

The lifting devico compfises tWo coluInnS 1 and 2. Each of the colUnnS 1and 2 includes on one hand a oylindef 3o and 30 and on the othef thfeeSectionS 4o, 4o, 5, sZ) and oo, oo, Which are telescopicany movable. Incolun1n 1 the sections 4o, so and ozZ, counting ffom be1ovv, havedecfeaSing afeas, WhilSt the sections sZ), 40 and 30 in column Z haveafeas Which incfeaSe ffofI1 below. Accofding to the embodiment shown thetWo colnfnns 1 and Z afe identical and opposed.

The Sectfons 4o and so have the SaIne cofnn1on afea as the Sections so,4o and the Secfions oo, 3 Z), fespec tive1y, The Sections 4 and 3o maythos have an afea of 100 square onits, the sectionS so and 4o an afea of86 squafe unitS and tho sections oo and so an afea of 2 72 Sq-uareunitS. The HgureS are given in a Suitable unit of area. The tofa1 afeaof each of the above three paifs of sectionS iS therefoTe 17Z Squareunits The tvVo teleScopic sections 4 and so, Second ffofn be1ow, in thetWo columns 1 and 2 afe united by means of ang1e iron 7, and the twoteleSco1)ic Sections So and 4Z), Which have equany lafge afeas, afeunited by fneanS of an angle ifon 8. The tWo oppefInost tele scopicSections o and 3o are intended to be United by Ineans of a liftingplafform 10 of likeconnecting device. The lovverInosf telescopicSectionS So and oo are Sup pofted on a stationafy base 11, to which theyare united. By uniong the feleScopic SectionS in the Way deScfibed abovea liffing device is obfained, all unifS of which have the san1e afea.

111 CaSe the 1ifting device ooiTlpfiseS foof, SiX, eight etc. colun1nSan Said colufnnS can be identical like thoSe acoofding to theeI11bodiInent Shovn, one ha1f being difected in one direction and theSecond ha1f in the othef difection. A1So in this eInbodilT1ent thepisfons in each paif of coII1Infls can be united vith each otheT bynleans of angle ifons. The fufther connection of the piStonS is thenaffanged in a S11itab1e vay.

The invention is not feStficted to thB featufes de scribed above andShown in the dfaWin1g but can be varied in Inany WayS Within the Scopeof the appendant c1aiIn. The colunlnS can thuS bo thfee, five, Sevenefc., in vvhich caSe the colun1nS need nof be identicaL The nun1ber ofpistons in each colun can of coufso be varied within vvide liInitS.

What I claim and deSife to secofe by Leftefs Pat ent is= IIydfauIictelescopic lifting appafafus coolpfising tvvo pafallel coluInnSpositioned beside each other, each of Said colunonS consiSting of fhesaIne non1bef of fe1e- Scopic sectionS and Which afe connected to aSoLlfce of pfeSSure n1ediunT, a base with which the lovVefn10StteleScopic Section in each co1un1n is engaged, a plat fofm connectingdevice With Which the upperInost tele Scopic Section i each colnIno iSengage(1, the coluInnS being arfanged olosely to each othef, eachtelesoopio Secfion in one coIUn1n, counting ffoIn tfle lafgef end ofSaid c(111Inn, figidly connected to that teleScopic sec tion in theothef column Which iS the san1e numbef of sectionS ffom the sInanef endof the othef colIITnf1, each paif of connected SecfionS having an equanylarge pfeS- sufe afea aS the preSSufe afea of each of the othef paifS ofconnected sectionS.

1efeTenoes Cffed in the file of this patent UNITED STATES PATENTsZ,163,9S9 NilSon 1une 27, 1939 2,Z40,794 MaSon May 6, 1941 2,7Z4,572vVeinbefg 1`Iov. ZZ 19S5

